1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1988, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)hostname.c 8.1 (Berkeley) 5/31/93 35 * $FreeBSD: src/bin/domainname/domainname.c,v 1.12.2.1 2001/08/01 02:32:16 obrien Exp $ 36 * $DragonFly: src/bin/domainname/domainname.c,v 1.7 2005/03/01 23:12:37 liamfoy Exp $ 37 */ 38 39 #include <sys/param.h> 40 41 #include <err.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 static void usage(void); 48 49 int 50 main(int argc, char **argv) 51 { 52 int ch; 53 char domainname[MAXHOSTNAMELEN]; 54 55 while ((ch = getopt(argc, argv, "")) != -1) { 56 switch (ch) { 57 default: 58 usage(); 59 } 60 } 61 argc -= optind; 62 argv += optind; 63 64 if (argc > 1) 65 usage(); 66 67 if (argv[0] != NULL) { 68 size_t len = strlen(argv[0]); 69 if (len > MAXHOSTNAMELEN) 70 errx(1, "domain name too long"); 71 72 if (setdomainname(*argv, len)) 73 err(1, "setdomainname"); 74 } else { 75 if (getdomainname(domainname, sizeof(domainname))) 76 err(1, "getdomainname"); 77 domainname[MAXHOSTNAMELEN-1] = '\0'; 78 printf("%s\n", domainname); 79 } 80 exit(0); 81 } 82 83 static void 84 usage(void) 85 { 86 fprintf(stderr, "usage: domainname [ypdomain]\n"); 87 exit(1); 88 } 89